Inspectors for the U.S. Public Health Service try to track down the cause of a rash of mysterious ailments suddenly appearing among the general populace.
Robert Urich
Maureen Reagan
Jack Hogan
Jed Allan
Alfred Ryder
Harry Townes
Lillian Lehman
Corinne Camacho
Anne Whitfield
Jackie Coogan
David Lewis
Tom Scott
Chris Anders
Priscilla Morrill
Walter Stocker
